The core is composed of 2 moving parts and depending of where the flag is in its cage, you can move one part or the other on different side of the cage.
You really need very good precision, because otherwise you cannot move the flag and think you're blocked, even if it's not the case at all!
Honestly, this puzzle has a lot of moves for a level 1! And I am sure a beginner would have difficulties. I would classify it as level 2.
With my old packagings I did not have the writting below, so it made me smile.
Well, when the solution doesn't go along with the puzzle, it just means that the designers/puzzle firms are too lazy to write a proper solution. The solution is part of the puzzle, it should always be included.
Luckily, it's not too difficult to find the solution of the cast puzzle on the internet if you're ever blocked.
You can buy this puzzle at Sloyd